1
Q
The majority of the atom’s mass
A
Nucleus
2
Q
Nuclides are to co-exists in a state of peacul tranquility
A
Stable isotopes
3
Q
Elements exhibits a degree of nuclear instability
A
Radioactive
4
Q
Isotopes that spontaneously emit radiation
A
Radio-isotopes
5
Q
Process in whic unstable atomic nucleus loses energy by emitting radiation
A
Radioactive decay
6
Q
Father of radioactivity
A
Henri Bequerel
7
Q
Emits very energetic radiation
A
Uranium
8
Q
Marie and pierre curie discovered
A
Radium
Polonium
9
Q
1 Radon = 1 Ci =
A
3.7 x 10^10 DPS or Bq
10
Q
1 Bq =
A
2.7 x 10^-11 Ci
11
Q
Sorces of radioactivity
A
Primordial
Cosmogenic
Human produced
12
Q
Before the creation of the earth
A
Primordial
13
Q
Result of cosmic ray interaction
A
Cosmogenic
RadPhy
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